power: Changed the minfreq to 400Mhz for display off scenario.

        1. Changes to set CPU0 min freq for 8939 target as below:
        Display off case :  set to  400Mhz
        Display on case  :  set to  960Mhz.

Change-Id: Ie8cf31484e70f83594778c899485910b9ff2578e

2 files changed, 209 insertions, 0 deletions

diff --git a/Android.mk b/Android.mk
index 3030995..cb0511e 100644
--- a/Android.mk
+++ b/Android.mk
@@ -36,6 +36,10 @@ ifeq ($(call is-board-platform-in-list, msm8909), true)
 LOCAL_SRC_FILES += power-8909.c
 endif
 
+ifeq ($(call is-board-platform-in-list, msm8916), true)
+LOCAL_SRC_FILES += power-8916.c
+endif
+
 ifeq ($(call is-board-platform-in-list, msm8994), true)
 LOCAL_SRC_FILES += power-8994.c
 endif
diff --git a/power-8916.c b/power-8916.c
new file mode 100644
index 0000000..4c50972
--- /dev/null
+++ b/power-8916.c
@@ -0,0 +1,205 @@
+/*
+ * Copyright (c) 2015, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * *    * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#define LOG_NIDEBUG 0
+
+#include <errno.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <dlfcn.h>
+#include <stdlib.h>
+
+#define LOG_TAG "QTI PowerHAL"
+#include <log/log.h>
+#include <hardware/hardware.h>
+#include <hardware/power.h>
+
+#include "utils.h"
+#include "metadata-defs.h"
+#include "hint-data.h"
+#include "performance.h"
+#include "power-common.h"
+
+#define MIN_FREQ_CPU0_DISP_OFF 400000
+#define MIN_FREQ_CPU0_DISP_ON  960000
+
+static int saved_dcvs_cpu0_slack_max = -1;
+static int saved_dcvs_cpu0_slack_min = -1;
+static int saved_mpdecision_slack_max = -1;
+static int saved_mpdecision_slack_min = -1;
+static int saved_interactive_mode = -1;
+static int slack_node_rw_failed = 0;
+static int display_hint_sent;
+int display_boost;
+
+static int is_target_8916() /* Returns value=8916 if target is 8916 else value 0 */
+{
+    int fd;
+    int is_target_8916=0;
+    char buf[10] = {0};
+
+    fd = open("/sys/devices/soc0/soc_id", O_RDONLY);
+    if (fd >= 0) {
+        if (read(fd, buf, sizeof(buf) - 1) == -1) {
+            ALOGW("Unable to read soc_id");
+            is_target_8916 = 0;
+        } else {
+            int soc_id = atoi(buf);
+            if (soc_id == 206 || (soc_id >= 247 && soc_id <= 250))  {
+            is_target_8916 = 8916; /* Above SOCID for 8916 */
+            }
+        }
+    }
+    close(fd);
+    return is_target_8916;
+}
+
+int  power_hint_override(struct power_module *module, power_hint_t hint,
+        void *data)
+{
+
+    switch(hint) {
+        case POWER_HINT_VSYNC:
+        break;
+        case POWER_HINT_INTERACTION:
+        {
+            int resources[] = {0x702, 0x20F, 0x30F};
+            int duration = 3000;
+
+            interaction(duration, sizeof(resources)/sizeof(resources[0]), resources);
+        }
+            return HINT_HANDLED;
+        case POWER_HINT_VIDEO_ENCODE: /* Do nothing for encode case  */
+            return HINT_HANDLED;
+        case POWER_HINT_VIDEO_DECODE: /*Do nothing for encode case  */
+            return HINT_HANDLED;
+    }
+return HINT_NONE;
+}
+
+int  set_interactive_override(struct power_module *module, int on)
+{
+    char governor[80];
+    char tmp_str[NODE_MAX];
+    struct video_encode_metadata_t video_encode_metadata;
+    int rc;
+
+    ALOGI("Got set_interactive hint");
+
+    if (get_scaling_governor(governor, sizeof(governor)) == -1) {
+        ALOGE("Can't obtain scaling governor.");
+
+        return HINT_HANDLED;
+    }
+
+    if (!on) {
+        /* Display off. */
+       switch(is_target_8916()) {
+
+          case 8916:
+           {
+            if ((strncmp(governor, INTERACTIVE_GOVERNOR, strlen(INTERACTIVE_GOVERNOR)) == 0) &&
+                (strlen(governor) == strlen(INTERACTIVE_GOVERNOR))) {
+               int resource_values[] = {TR_MS_50, THREAD_MIGRATION_SYNC_OFF};
+
+                  if (!display_hint_sent) {
+                      perform_hint_action(DISPLAY_STATE_HINT_ID,
+                      resource_values, sizeof(resource_values)/sizeof(resource_values[0]));
+                      display_hint_sent = 1;
+                  }
+            } /* Perf time rate set for 8916 target*/
+           } /* End of Switch case for 8916 */
+            break ;
+
+            default:
+            {
+             if ((strncmp(governor, INTERACTIVE_GOVERNOR, strlen(INTERACTIVE_GOVERNOR)) == 0) &&
+                (strlen(governor) == strlen(INTERACTIVE_GOVERNOR))) {
+               int resource_values[] = {TR_MS_CPU0_50,TR_MS_CPU4_50, THREAD_MIGRATION_SYNC_OFF};
+
+               /* Set CPU0 MIN FREQ to 400Mhz avoid extra peak power
+                  impact in volume key press  */
+               snprintf(tmp_str, NODE_MAX, "%d", MIN_FREQ_CPU0_DISP_OFF);
+               if (sysfs_write(SCALING_MIN_FREQ, tmp_str) != 0) {
+                 if(!slack_node_rw_failed) {
+                   ALOGE("Failed to write to %s",SCALING_MIN_FREQ );
+                 }
+                  rc = 1;
+                }
+
+                  if (!display_hint_sent) {
+                      perform_hint_action(DISPLAY_STATE_HINT_ID,
+                      resource_values, sizeof(resource_values)/sizeof(resource_values[0]));
+                      display_hint_sent = 1;
+                  }
+             } /* Perf time rate set for CORE0,CORE4 8939 target*/
+           }/* End of Switch case for 8939 */
+           break ;
+          }
+
+    } else {
+        /* Display on. */
+      switch(is_target_8916()){
+         case 8916:
+         {
+          if ((strncmp(governor, INTERACTIVE_GOVERNOR, strlen(INTERACTIVE_GOVERNOR)) == 0) &&
+                (strlen(governor) == strlen(INTERACTIVE_GOVERNOR))) {
+            undo_hint_action(DISPLAY_STATE_HINT_ID);
+            display_hint_sent = 0;
+         }
+         }
+         break ;
+         default :
+         {
+
+          if ((strncmp(governor, INTERACTIVE_GOVERNOR, strlen(INTERACTIVE_GOVERNOR)) == 0) &&
+                (strlen(governor) == strlen(INTERACTIVE_GOVERNOR))) {
+
+              /* Recovering MIN_FREQ in display ON case */
+              snprintf(tmp_str, NODE_MAX, "%d", MIN_FREQ_CPU0_DISP_ON);
+              if (sysfs_write(SCALING_MIN_FREQ, tmp_str) != 0) {
+                  if(!slack_node_rw_failed) {
+                     ALOGE("Failed to write to %s",SCALING_MIN_FREQ );
+                  }
+                   rc = 1;
+              }
+             undo_hint_action(DISPLAY_STATE_HINT_ID);
+             display_hint_sent = 0;
+          }
+
+        }
+         break ;
+      } /* End of check condition during the DISPLAY ON case */
+   }
+    saved_interactive_mode = !!on;
+    return HINT_HANDLED;
+}
+